sulcus
Americannoun
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a furrow or groove.
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Anatomy. a groove or fissure, especially a fissure between two convolutions of the brain.
noun
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a linear groove, furrow, or slight depression
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any of the narrow grooves on the surface of the brain that mark the cerebral convolutions Compare fissure
Other Word Forms
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Nouns
Etymology
Origin of sulcus
1655–65; Latin: furrow
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
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These patterns were based on sulcus depth and cortical thickness, which describe the folding of the brain surface and the thickness of the brain's outer layer.
From Science Daily ● Jan. 4, 2026
"You can think about the intraparietal sulcus as having two knobs on a radio dial: one that adjusts focusing and one that adjusts filtering," Ritz said.
From Science Daily ● Mar. 8, 2024
The great cardiac vein can be seen initially on the surface of the heart following the interventricular sulcus, but it eventually flows along the coronary sulcus into the coronary sinus on the posterior surface.
From Textbooks ● Jun. 19, 2013
The coronary sinus is a large, thin-walled vein on the posterior surface of the heart lying within the atrioventricular sulcus and emptying directly into the right atrium.
From Textbooks ● Jun. 19, 2013
In front of the central lobe, on the base of the brain, are the orbital gyri, which are separated from one another by the orbital sulcus.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4 "Bradford, William" to "Brequigny, Louis" by Various
Soccer players who headed the ball at high levels showed abnormality of the brain's white matter adjacent to sulci, which are deep grooves in the brain's surface.
From Science Daily ● Nov. 27, 2024
The neocortex—the outermost layer of the brain characterized by the squiggly sulci, or brain folds—is the region that gives all primates their exceptional intelligence.
From Science Magazine ● Nov. 16, 2015
Coronary vessel branches that remain on the surface of the artery and follow the sulci are called epicardial coronary arteries.
From Textbooks ● Jun. 19, 2013
The surface of the brain can be mapped on the basis of the locations of large gyri and sulci.
From Textbooks ● Jun. 19, 2013
It is most remarkable that, as soon as all the principal sulci appear, the pattern according to which they are arranged is identical with the corresponding sulci in man.
From The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895 by Tyler, John Mason
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
